pH-Triggered Tannic Acid Release from ZIF-8@ZIF-L for Intelligent Self-Healing Epoxy Coatings in Marine Environments

Key Points

• The aim is to explore a self-healing mechanism in epoxy coatings using pH-triggered tannic acid release from a zinc-based framework.
• Developed epoxy coatings with ZIF-8@ZIF-L for enhanced self-healing properties.
• Implemented pH-triggered release system to deliver tannic acid on-demand at damaged sites.
• Assessed the performance of coatings in simulated marine environments.
• Demonstrated effective release of tannic acid upon pH changes, enhancing healing at damaged sites.
• Achieved a durable protective interfacial film that significantly reduced corrosion rates.
• Showed scalability for practical application in marine coatings.